JP2009266274A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a disk on a tray from moving in a backward side and from deviating greatly. <P>SOLUTION: A disk device is provided with a loader chassis 6 supporting a tray 5 so as to be movable back and forth (a), (b), and a traverse chassis mounted with an optical pickup 7 and a turntable 8. An opening part 17 is arranged from the center of the tray 5 to the vicinity of a rear end. A small diameter recessed part 18 for placing a small diameter disk and a large diameter recessed part 19 for placing a large diameter disk are concentrically formed at the center of the upper face 5a of the tray 5. A pair of pins 32a, 32b are arranged projectingly and integrally at two corner parts A between the large diameter recessed part 19 of the upper face 5a of the tray 5 and the opening part 17. A plurality of projection parts 33a to 33c are arranged projectingly at the top board part of the shielding box 25 covering the loader chassis 6 while being adjacent to the both pins 32a, 32b. The both pins 32a, 32b and respective projection parts 33a to 33c block movement of the disk on the tray 5 to the backward (b) side over the large diameter recessed part 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a disk device such as a DVD recorder or a DVD player, and in particular,
The disk on the tray is prevented from being greatly detached backward.

FIG. 10 is a horizontal sectional view, FIG. 11 is a vertical sectional view, and FIG. 12 is a perspective view of the main part.

As shown in FIGS. 10 to 12, the disk device has a device body 2 and a control unit 3 arranged in a housing 1, and the housing 1 includes a top plate portion 1 a, a bottom plate portion 1 b, and a front plate. A rectangular box shape is formed by the portion 1c.

As shown in FIGS. 10 and 11, the apparatus main body 2 includes a loader chassis 6 that supports the tray 5 so as to be movable forward and backward a and b, and is pivotally supported by the loader chassis 6 so as to be movable up and down c and d. A traverse chassis 9 on which a pickup 7 and a turntable 8 are mounted, and a cam slider 10 at a front portion of the loader chassis 6 is moved in the left-right direction e, f perpendicular to the forward / backward a / b direction.
The cam slider 10 and the traverse are arranged by a cam mechanism 11 including a cam groove 11a formed in the cam slider 10 and a cam shaft 11b protruding from the front portion of the traverse chassis 9 and fitted in the cam groove 11a. The chassis 9 is linked and connected.

As shown in FIGS. 10 and 11, a clamper 15 is arranged on a cross beam 14 that is installed between both side plates 6 a of the loader chassis 6 so as to face the turntable 8 so as to be able to move up and down within a certain range.
Reference numeral 16 denotes a spindle motor for rotating the turntable 8 at a high speed.

As shown in FIGS. 10 and 11, an opening 17 is formed along the forward and backward a and b directions from the center of the tray 5 to the vicinity of the rear end, and an 8 cm small-diameter disk is formed at the center of the upper surface 5 a of the tray 5. A small-diameter recess 18 for mounting Da and a large-diameter recess 19 for mounting a 12 cm large-diameter disk Db are formed concentrically.

As shown in FIG. 10, the control unit 3 includes an AV printed circuit board 20 on which various electronic components are mounted.
And a main board 21.

In the above-described configuration, in the play mode, the traverse chassis 9 is moved up c and the turntable 8 lifts the small-diameter disk Da in the small-diameter recess 18 or the large-diameter disk Db in the large-diameter recess 19, and the turntable 8 and the clamper 15 The disk Da (or Db) is clamped with the above, the clamped disk Da (or Db) is rotated at a high speed by the turntable 8, and a laser beam is projected onto the disk Da (or Db) through the objective lens OL of the optical pickup 7. Then, the reflected light is received through the optical pickup 7, the information recorded on the disk Da (or Db) is read based on the received light signal, and the video is reproduced or recorded on a monitor (not shown). .

When an unloading signal is input in the play mode, the cam slider 10 is slid in the direction of arrow e (or arrow f) to move the traverse chassis 9 downward (see FIG. 11).
After delivering the disk Da (or Db) from the turntable 8 to the tray 5, the tray 5 is advanced a (see the phantom line in FIG. 11), the disk Da (or Db) is taken out from the tray 5 and a new disk Da ( Alternatively, Db) is placed on the tray 5.

Subsequently, when a loading signal is input, the tray 5 is moved backward b and stored in the loader chassis 6, and then the cam slider 10 is slid in the direction of arrow f (or arrow e) to move the traverse chassis 9 upward c. As a result, the disk Da (or Db) on the tray 5
) Is clamped by the turntable 8 and the clamper 15.

In the above configuration, as shown by the phantom line in FIG. 11, when the power is turned off in a state where the tray is advanced a, the traverse chassis 9 is stopped in the downward movement d state, and in this state, the tray 5 When the tray 5 is forcibly pushed to the reverse b side and the tray 5 is returned into the loader chassis 6, the turntable 8 is held in a lowered state as shown by the solid line in FIG. Thus, the disk Da (or Db) on the tray 5 is not clamped.

In the unclamped state, as shown by the phantom line in FIG. 11, when the housing 1 is tilted to carry it to another location, for example, the disk Da (or Db) on the tray 5 exceeds the large-diameter recess 19. If the power is turned on from this state and the tray 5 is moved forward a based on the unloading signal, the disk Da (or Db) may be left behind.

There exists what was described in patent document 1 as a technique which solves the said problem. As shown in FIGS. 10 and 11, projections 23a to 23c are integrally projected at the center of the lower surface of the synthetic resin top plate 1a and at the left and right ends thereof, and the projection 23b at the center. Is positioned near the center of the rear edge of the tray 5 and rearward thereof, and the projections 23a and 3c on both left and right sides thereof are arranged above the concave step portions 5b on both sides of the tray 5, and each of the projections 23a to 23c. Is positioned below the upper surface 5 a of the tray 5.

In the above configuration, when the casing 1 is tilted (see the phantom line in FIG. 11), when the large-diameter disk Db on the tray 5 moves greatly to the reverse b side, in the case of the large-diameter disk Db, the virtual line Sb As shown, the movement is blocked by the three protrusions 23a to 23c, and the small-diameter disk D
In the case of a, as shown by the virtual line Sa, the two protrusions 23a, 23b (or 23b,
23c) prevents its movement, thereby preventing the disk Da (or Db) from being left behind.
JP 2006-179076 A

In the above-described conventional configuration, the projections 23a to 23c are positioned considerably rearward with respect to the large-diameter recess 19 of the tray 5 housed in the loader chassis 6, and therefore, the virtual line Sa is shown in FIG.
As shown in FIG. 2, a small-diameter disk D is formed by two protrusions 23b and 23c (or 23a and 23b).
When the movement of a is prevented, the small-diameter disk Da is greatly disengaged from the large-diameter recess 19 toward the reverse b side and rides on the upper surface 5a of the tray 5 in a horizontal state. The small-diameter disk Da may come into contact with the clamper 15, the cross beam 14, and / or the side plate 6a of the loader chassis 6 and be damaged.

Moreover, since each protrusion part 23a-23c is formed with a comparatively thin and long synthetic resin material,
The protrusions 23a to 23c may be thermally deformed by the high temperature atmosphere in the warehouse or during storage, and the function of the protrusions 23a to 23c may be deteriorated due to the heat deformation.

An object of the present invention is to provide a disk device that prevents the disk on the tray from moving to the reverse side and largely coming off.

In order to achieve the above object, a first aspect of the present invention includes a loader chassis that supports a tray so that the tray can move forward and backward, and a traverse chassis that is pivotally supported by the loader chassis so as to move up and down and has an optical pickup and a turntable mounted thereon. And an opening is formed in the forward and backward direction from the center of the tray to the vicinity of the rear end so as to face the optical pickup and the turntable, and a small diameter is provided at the center of the upper surface of the tray. A small-diameter recess for mounting the disk and a large-diameter recess for mounting the large-diameter disk are formed concentrically, and the traverse chassis is moved up to turn the small-diameter disk or large-diameter in the small-diameter recess by the turntable. The large-diameter disc in the radial recess is lifted, and the lifted disc is rotated at high speed by a turntable and recorded on the disc. In a disk device in which information is read via an optical pickup, a pair of pins are integrally projected at two corners between the large-diameter recess and the opening on the upper surface of the tray, and adjacent to both the pins. A plurality of protrusions project from the top plate of the shielding box that covers the loader chassis, and the disks on the tray move past the large-diameter recesses to move to the reverse side. It is characterized by being blocked by the department.

According to a second aspect of the present invention, in the first aspect of the present invention, three projections are provided at the center between the two pins and at the outer side spaced apart from the pins by the three projections. The outer peripheral surface of the projection is formed in a tapered shape with a narrowed bottom, the outer diameter of the lower end surface of each projection is set larger than the outer diameter of both pins, and the lower end surface of the central projection and the upper surface of the tray Is set smaller than the thickness of the disk, each protrusion is positioned on a reference virtual circle having a predetermined radius from the axis of both recesses, and both pins are on the reference virtual circle or the reference virtual circle. It is characterized by being positioned on an outer virtual circle that is concentric and slightly larger in diameter.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the horizontal level of the lower end surface of each protrusion is positioned below the horizontal level of the upper end surface of the pins. It is a feature.

According to the first aspect of the present invention, when the disk on the tray accommodated in the loader chassis is not clamped, the disk on the tray is made large by tilting the casing to carry it to another location, for example. Even if it moves to the reverse side beyond the radial recess and tries to come off greatly, the movement is blocked by both the toilet side pins and the projections on the shielding box side. It is possible to reliably prevent the disk from being left behind in the loader chassis and being unable to be removed.

In particular, both the pins and the protrusions are positioned close to the large-diameter recess, and even a small-diameter disk does not greatly disengage from the large-diameter recess to the reverse side as in the prior art and ride on the upper surface of the tray. Therefore, the small-diameter disk can be smoothly taken out of the loader chassis.

In addition, since both the pins and the projections are relatively short, the pins and the projections are not thermally deformed by a high temperature atmosphere during transportation or in a warehouse, and the functions of the pins and the projections are ensured. Can be maintained.

According to the second aspect of the present invention, for example, by tilting the casing to carry it to another place, the disk on the tray moves to the reverse side over the large-diameter recess while in contact with the side plate of the loader chassis. Even if the outer peripheral edge of the disk is pushed down along the tapered outer peripheral surface of the opposing outer protrusion, it is guided toward the center of the tray and is prevented from moving by the adjacent pin and the central protrusion. Therefore, even a small-diameter disk can be reliably taken out of the loader chassis in a state where it is not damaged by contacting the side plate of the loader chassis.

According to the invention described in claim 3, since the upper end surfaces of both pins and the lower end surfaces of the projections are overlapped with each other, it is possible to reliably prevent the disk from passing between the pins and the projections. can do.

1 to 9 show a disk apparatus according to an embodiment of the present invention. FIG. 1 is a horizontal sectional view of the same, FIG. 2 is a perspective view of the apparatus main body, and FIG. 3 is an exploded view of the apparatus main body. 4 is a longitudinal sectional view of the same play mode, FIG. 5 is a plan view of the tray in a state where the loader chassis is housed, FIG. 6 is an enlarged lateral sectional view of the main part, and FIG. 7 is a longitudinal sectional view of the unclamped state. FIG. 8 is a plan view showing the movement prevention state of the same small-diameter disk, FIG. 9A is an enlarged vertical sectional view of the main part showing the previous stage of the movement prevention state of the same small-diameter disk, and FIG. It is an expanded longitudinal cross-sectional view of the principal part which shows a back | latter stage.

As shown in FIG. 1, the apparatus main body 2 is housed in a metal plate shielding box 25 having an electromagnetic shielding function, and the apparatus main body 2 with the shielding box 25 is disposed in the casing 1. A door 27 is disposed at a disc outlet 26 formed in the front plate portion 1c so as to be openable and closable. In the configuration other than the above, the same components as those shown in FIGS.

As shown in FIGS. 1 to 3, the shielding box 25 is made of a press-molded bottom chassis 25 </ b> A.
The bottom chassis 25A includes a rectangular bottom plate portion 25a in plan view, a pair of base portions 25b and a pair of receiving portions 25c formed by bending both side edges of the bottom plate portion 25a. And a pair of front and rear standing plate portions 2 raised from both front and rear edges of the bottom plate portion 25a.
5d and 25e, and a tray outlet 28 is formed in the front upright plate portion 25d, and the leg portion 6b of the loader chassis 6 is fixed to each base portion 25b.

The top chassis 25B includes a top plate portion 25f, left and right side plate portions 25g, 25h and a rear plate portion 25i formed by bending downward from the both side edges and the rear end edge of the top plate portion 25f.
A pair of edge plate portions 25j formed by bending outward at right angles from the lower ends of the left and right side plate portions 25g and 25h, and each edge plate portion 25j is placed on each of the receiving base portions 25c and screwed. 29 is fixed. Reference numeral 30 denotes a reinforcing frame press-formed on the top plate portion 25f.

As shown in FIG. 4, the traverse chassis 9 has a chassis main body 9a connected to the loader chassis 6 via a rear elastic body 38 made of rubber at the rear, and a front elastic made of rubber at the front of the chassis main body 9a. A lifting body 9b connected via a body 39, and a chassis body 9
A spindle motor 16 with a turntable 8 and an optical pickup 7 are mounted on a, and a camshaft 11b is integrally projected from an elevating body 9b. In FIG. 1, reference numeral 40 denotes a drive pinion that meshes with a cam rack 10 a formed at one end of the cam slider 10.
Is slid in the left and right directions e and f or engaged with a tray rack (not shown) integrally formed on the lower surface of the tray 5 to move the tray 5 forward and backward a and b.

In the above configuration, the solid line in FIG. 4 indicates the play mode, and its operation is almost the same as that of the conventional example described at the beginning.

When an unloading signal is input in the play mode, the traverse chassis 9 is moved down d via the cam mechanism 11 by rotating the drive pinion 40 and sliding the cam slider 10 in the direction of arrow e (see FIG. 4). (See chain line), turntable 8 to tray 5
Then, the disk Da (or Db) is delivered to the drive pinion 40, and a tray rack (not shown) is engaged with the drive pinion 40 to advance the tray 5 (see the two-dot chain line in FIG. 4). Db) is taken out and a new disk Da (or Db) is placed on the tray 5.

Subsequently, when a loading signal is input, the tray 5 is moved backward b and stored in the loader chassis 6 in the reverse procedure, and then the cam slider 10 is slid in the direction of the arrow f to move the traverse chassis 9 upward. By moving c, the disk Da (or Db) on the tray 5 is clamped by the turntable 8 and the clamper 15 (see the solid line in FIG. 4).

As shown in FIGS. 2 to 6, 2 between the large-diameter recess 19 and the opening 17 on the upper surface 5 a of the tray 5.
A pair of pins 32a and 32b are integrally projected on one corner A, and a plurality of protrusions 33a to 33c are press-molded on the top plate 25f adjacent to the pins 32a and 32b.

As shown in FIGS. 5 and 6, the protrusions 33 a to 33 c are provided at the center between the pins 32 a and 32 b and at the outer side with a predetermined distance h from the pins 32 a and 32 b, 3
The outer peripheral surfaces 34 of the two projecting portions 33a to 33c are formed in a tapered shape, and the outer diameter d1 of the lower end surface 35 of each of the projecting portions 33a to 33c is larger than the outer diameter d2 of both the pins 32a and 32b. The distance k between the lower end surface 35 of the central projection 33b and the upper surface 5a of the tray 5 is set smaller than the thickness t of the disk Da (or Db) (see FIG. 9A), The protrusions 33a to 33c are positioned on a reference virtual circle Pa having a predetermined radius R from the axial center O of both concave portions 18 and 19, and both pins 32a and 32b are also positioned on the reference virtual circle Pa. , 32b, the horizontal level Lb of the lower end surface 35 of each of the projections 33a to 33c is positioned downward with a predetermined interval β with respect to the horizontal level La of the upper end surface 36 of 32b.

As an example of specific dimensions, in FIGS. 5 and 6, the arrangement angle α of each projection 33 a to 33 c is 50 °, the outer diameter d1 of the lower end surface 35 of each projection 33 a to 33 c is 3 mm, and the center projection 3
The protrusion width m1 of 3b is 1.5 mm, the protrusion width m2 of the outer protrusions 33a and 33c is 1 mm, and the radius R from the axis O to the center of each of the protrusions 33a to 33c is 65 mm.

The distance h from each pin 32a, 32b to the outer protrusion 33a, 33c is 10 mm, the outer diameter d2 of each pin 32a, 32b is 1.5 mm, and the height m3 of each pin 32a, 32b is 2.25 m.
m, and the interval β between the horizontal levels La and Lb is 0.5 to 1.5 mm.

As shown by the two-dot chain line in FIG. 4, when the power is turned off in the state where the tray is moved forward a, the traverse chassis 9 is stopped in the downward movement d state, and in this state, the traverse chassis 9 is moved backward by the finger. When the tray 5 is forcibly pushed to the b side and returned to the loader chassis 6, the turntable 8 remains lowered as shown in FIG. 7, and the disk on the tray 5 is moved between the turntable 8 and the clamper 15. Da (or Db) is not clamped.

In the unclamped state, as shown by the phantom line in FIG. 7, the disk 1 (or Db) on the tray 5 is caused to move the large-diameter recess 19 by tilting the casing 1 to carry it to another location, for example. Even if it moves over to the reverse b side and tries to deviate greatly, the movement is changed to both pins 32a, 3
2b and the projections 33a to 33c prevent the disk Da (or Db) from staying in the large-diameter recess 19, and the disk Da (or Db) is left behind in the loader chassis 6 and cannot be removed. Can be surely prevented.

Further, since the upper end surfaces 36 of the pins 32a and 32b and the lower end surfaces 35 of the projections 33a to 33c are overlapped with each other, the disk Da (or Db) is connected to the pins 32a and 32b and the projections 33a to 33a. It can be reliably prevented from passing through the space 33c.

Furthermore, since both the pins 32a and 32b and the projections 33a to 33c are relatively short and each of the projections 33a to 33c is made of metal, both the pins 32a are caused by a high temperature atmosphere during transportation or in a warehouse.
32b and the protrusions 33a to 33c are not thermally deformed, and both the pins 32a and 3b.
The function of 2b and each projection part 33a-33c can be maintained reliably.

Here, when the large-diameter disk Db moves to the reverse b side beyond the large-diameter recess 19, the outer peripheral edge of the large-diameter disk Db moves along both the tapered outer peripheral surfaces 34 of the protrusions 33 a to 33 c. The pins 32a and 32b are pushed down to the outer peripheral surface to prevent the movement.

When the small-diameter disk Da moves to the reverse b side along the side plate 6a of the loader chassis 6 as shown by a one-dot chain line in FIG. 8, the outer peripheral edge of the small-diameter disk Da as shown in FIG. Is guided toward the center of the tray 5 while being pushed down along the tapered outer peripheral surface 34 of the opposing outer projection 33a (in the direction of arrow g), and the pin 32a adjacent to the small-diameter disk Da.
And the central protrusion 33b are prevented from moving (see the two-dot chain line in FIG. 8 and FIG. 9B).

According to the above configuration, even the small-diameter disk Da can be reliably taken out of the loader chassis 6 so as not to be damaged by contact with the side plate 6a of the loader chassis 6.

In particular, the pins 32a and 32b and the projections 33a to 33c are positioned close to the large-diameter concave portion 19, so that even the small-diameter disk Da is largely disengaged from the large-diameter concave portion 19 toward the reverse b side as in the prior art. The small-diameter disk Da.
Can be taken out of the loader chassis 6 smoothly.

In the above-described embodiment, the pins 32a and 32b are arranged on the reference virtual circle Pa. As a modification thereof, as shown in FIG. For example, it may be positioned on the outer virtual circle Pb having a large diameter with a distance of 0.5 mm to 1 mm. According to this, since each pin 32a, 32b is located behind each projection part 33a-33c, the outer periphery of the disk Da (or Db) is along the taper-shaped outer peripheral surface 34 of each projection part 33a-33c. Thus, the pins 32a and 32b can be more smoothly guided to the outer peripheral surface.

It is a horizontal sectional view showing a disk device which is an embodiment of the present invention. It is a perspective view of the apparatus main body. It is a disassembled perspective view of the apparatus main body. It is a longitudinal cross-sectional view of the play mode. It is a top view of the loader chassis accommodation state of the tray. It is an expanded horizontal sectional view of the principal part. It is a longitudinal cross-sectional view of the unclamped state. It is a top view which shows the movement prevention state of the same small diameter disc. (A) is an enlarged vertical cross-sectional view of the main part showing the previous stage of the movement prevention state of the same small-diameter disk, and (b) is an enlarged vertical cross-sectional view of the main part showing the subsequent stage. It is a horizontal sectional view showing a conventional example. It is the longitudinal cross-sectional view. It is a perspective view of the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 5 Tray 6 Loader chassis 7 Optical pick-up 8 Turntable 17 Opening part 18 Small diameter recessed part 19 Large diameter recessed part 32a, 32b Pin 33a-33c Projection part 34 Outer peripheral surface of projection part 35 Lower end surface of projection part 36 Upper end surface of pin Da Small-diameter disk Db Large-diameter disk d1 Outer diameter of the lower end surface of the protrusion d2 Outer diameter of the pin k Distance between the lower end surface of the central protrusion and the upper surface of the tray La Horizontal level of the upper end surface of the pin Lb Horizontal level of lower end surface Pa Reference virtual circle Pb Outer virtual circle t Disc thickness a, b Back and forth c, d Vertical movement e, f Left-right direction

Claims (3)

There is provided an apparatus main body comprising a loader chassis that supports a tray so as to be able to move forward and backward, and a traverse chassis that is pivotally supported by the loader chassis so as to move up and down and mounts an optical pickup and a turntable. An opening is formed in the forward / backward direction from the center of the tray to the vicinity of the rear end thereof, and a small-diameter recess and a large-diameter disk for mounting a small-diameter disk are placed in the center of the upper surface of the tray. The large-diameter recess for placement is concentrically formed, and the traverse chassis is moved up to lift the small-diameter disk in the small-diameter recess or the large-diameter disk in the large-diameter recess by the turntable, and the lifted disk It is rotated at high speed by a turntable and the information recorded on the disc is read through an optical pickup. In the disc apparatus, a pair of pins are integrally projected at two corners between the large-diameter recess and the opening on the upper surface of the tray, and the top of the shielding box covering the loader chassis is adjacent to the two pins. A plurality of protrusions are provided on the plate, and both pins and each protrusion prevent the disk on the tray from moving beyond the large-diameter recess to the reverse side. Disk unit to be used. Three each of the projections are provided at the center between the pins and the outside at a predetermined interval from the pins, and the outer peripheral surface of the three projections is formed in a tapered shape with a downward slope. The outer diameter of the lower end surface of each protrusion is set larger than the outer diameter of both pins, the distance between the lower end surface of the central protrusion and the upper surface of the tray is set smaller than the thickness of the disc, and each protrusion Are positioned on a reference virtual circle having a predetermined radius from the axis of both concave portions, and both pins are positioned on the reference virtual circle or on the outer virtual circle that is concentric with and slightly larger than the reference virtual circle. The disk device according to claim 1. 3. The disk device according to claim 1, wherein a horizontal level of a lower end surface of each protrusion is positioned downward with respect to a horizontal level of the upper end surfaces of the pins.

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